CA2772978A1 - Internal milling cutter - Google Patents
Internal milling cutter Download PDFInfo
- Publication number
- CA2772978A1 CA2772978A1 CA 2772978 CA2772978A CA2772978A1 CA 2772978 A1 CA2772978 A1 CA 2772978A1 CA 2772978 CA2772978 CA 2772978 CA 2772978 A CA2772978 A CA 2772978A CA 2772978 A1 CA2772978 A1 CA 2772978A1
- Authority
- CA
- Canada
- Prior art keywords
- tool support
- milling cutter
- machine holder
- internal milling
- bayonet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
- 238000003801 milling Methods 0.000 title claims abstract description 14
- 210000001331 nose Anatomy 0.000 claims description 3
- 230000000717 retained effect Effects 0.000 claims description 3
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000009499 grossing Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
- B23B31/02—Chucks
- B23B31/10—Chucks characterised by the retaining or gripping devices or their immediate operating means
- B23B31/113—Retention by bayonet connection
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C5/00—Milling-cutters
- B23C5/02—Milling-cutters characterised by the shape of the cutter
- B23C5/08—Disc-type cutters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C5/00—Milling-cutters
- B23C5/26—Securing milling cutters to the driving spindle
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C2210/00—Details of milling cutters
- B23C2210/50—Cutting inserts
- B23C2210/503—Cutting inserts mounted internally on the cutter
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C2215/00—Details of workpieces
- B23C2215/20—Crankshafts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C2220/00—Details of milling processes
- B23C2220/68—Whirling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C2240/00—Details of connections of tools or workpieces
- B23C2240/04—Bayonet connections
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T407/00—Cutters, for shaping
- Y10T407/19—Rotary cutting tool
- Y10T407/1906—Rotary cutting tool including holder [i.e., head] having seat for inserted tool
- Y10T407/1928—Tool adjustable relative to holder
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T407/00—Cutters, for shaping
- Y10T407/19—Rotary cutting tool
- Y10T407/1906—Rotary cutting tool including holder [i.e., head] having seat for inserted tool
- Y10T407/1934—Rotary cutting tool including holder [i.e., head] having seat for inserted tool with separate means to fasten tool to holder
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Milling Processes (AREA)
- Gripping On Spindles (AREA)
Abstract
The invention relates to an internal milling cutter, comprising an annular tool support (11) equipped on the inner casing thereof with cutting inserts. The tool support (11) is fastened in a machine holder (10). According to the invention a bayonet-type connection is provided between the tool support (11) and the machine holder (10).
Description
I
Internal milling cutter The invention relates to an internal milling cutter with an annular tool support which, on its inner lateral surface, is fitted with cutting inserts and is fastened in a machine holder.
Annular milling cutter disks with internal cutting edges, preferably indexable cutter inserts, have been known for some time now, also in respect of the use thereof, for crankshaft milling.
DE 34 38 978 C1 describes a device for fastening an internal-milling-cutter support on the accommodating flange of the milling-cutter drum of a crankshaft-milling machine by means of locking elements which, with the internal-milling-cutter support being pressed against the accommodating flange of the milling-cutter drum, can be brought into abutment with opposing surfaces on the respectively other part.
Wedges are fastened on the support or on the milling-cutter drum, and the sub-surfaces of these wedges form the opposing surfaces. Wedges in the form of ring elements are arranged on the milling-cutter drum or on the support, it being possible for these wedges to interact therewith and to be displaced radially in relation to the support axis, wherein in each case one eccentric is provided as a displacement drive for the displaceable part such that the combination of the eccentric with the wedge is self-locking.
DE 10 2009 006 010.3 describes a device for fastening an annular milling-tool support, in particular of an internal milling cutter, on a machine holder by means of a threaded connection between the milling-tool support and the machine holder.
This configuration has production-related advantages since only a small number of installation parts are required. Furthermore, this connection is easy to handle. The disadvantage, however, is that the tool-support disk has to be rotated a number of times in order to be securely fixed or released.
Internal milling cutter The invention relates to an internal milling cutter with an annular tool support which, on its inner lateral surface, is fitted with cutting inserts and is fastened in a machine holder.
Annular milling cutter disks with internal cutting edges, preferably indexable cutter inserts, have been known for some time now, also in respect of the use thereof, for crankshaft milling.
DE 34 38 978 C1 describes a device for fastening an internal-milling-cutter support on the accommodating flange of the milling-cutter drum of a crankshaft-milling machine by means of locking elements which, with the internal-milling-cutter support being pressed against the accommodating flange of the milling-cutter drum, can be brought into abutment with opposing surfaces on the respectively other part.
Wedges are fastened on the support or on the milling-cutter drum, and the sub-surfaces of these wedges form the opposing surfaces. Wedges in the form of ring elements are arranged on the milling-cutter drum or on the support, it being possible for these wedges to interact therewith and to be displaced radially in relation to the support axis, wherein in each case one eccentric is provided as a displacement drive for the displaceable part such that the combination of the eccentric with the wedge is self-locking.
DE 10 2009 006 010.3 describes a device for fastening an annular milling-tool support, in particular of an internal milling cutter, on a machine holder by means of a threaded connection between the milling-tool support and the machine holder.
This configuration has production-related advantages since only a small number of installation parts are required. Furthermore, this connection is easy to handle. The disadvantage, however, is that the tool-support disk has to be rotated a number of times in order to be securely fixed or released.
It is an object of the present invention to improve the connection between the tool support and the machine holder in respect of quicker handling.
This object is achieved by an internal milling cutter according to claim 1.
According to the invention, the tool support and the machine holder are fastened on one another by means of a bayonet connection. A bayonet connection has the particular advantage that only a small angle of rotation has to be covered in order for it to be possible for the parts to be mounted on one another. In addition, such connecting means are of straightforward design, are easy to produce and are not susceptible to malfunctioning during operation.
It is basically immaterial which part has the protrusions, which are guided, and rotated, in corresponding recesses until the protrusions are retained on undercuts.
According to a further configuration of the invention, a strip-like annular body with equidistant protrusions is used as part of the bayonet connection which is screwed in a releasable manner to the tool support or the machine holder and, together therewith, forms a groove-like partially interrupted bayonet guide. This annular body can advantageously be easily exchanged if frequent tool changeover has resulted in wear which means that the bayonet guide is no longer reliable.
The bayonet connections used are preferably those in which the tool support, on its outer lateral surface, has 2 to 20, preferably 12, radially projecting protrusions, which are retained directly on corresponding undercuts of the tool support or of the strip-like annular body. It generally suffices to have 12 protrusions with corresponding abutments on undercuts in order to provide for reliable and constantly reproducible, identical orientation.
In order for it to be possible, on account of production tolerances, to compensate for concentricity errors, preferably adjustable wedges are used as centering elements, which are known, in principle, from the prior art, and are described, for example, in DE 34 39 978 C1 mentioned above.
This object is achieved by an internal milling cutter according to claim 1.
According to the invention, the tool support and the machine holder are fastened on one another by means of a bayonet connection. A bayonet connection has the particular advantage that only a small angle of rotation has to be covered in order for it to be possible for the parts to be mounted on one another. In addition, such connecting means are of straightforward design, are easy to produce and are not susceptible to malfunctioning during operation.
It is basically immaterial which part has the protrusions, which are guided, and rotated, in corresponding recesses until the protrusions are retained on undercuts.
According to a further configuration of the invention, a strip-like annular body with equidistant protrusions is used as part of the bayonet connection which is screwed in a releasable manner to the tool support or the machine holder and, together therewith, forms a groove-like partially interrupted bayonet guide. This annular body can advantageously be easily exchanged if frequent tool changeover has resulted in wear which means that the bayonet guide is no longer reliable.
The bayonet connections used are preferably those in which the tool support, on its outer lateral surface, has 2 to 20, preferably 12, radially projecting protrusions, which are retained directly on corresponding undercuts of the tool support or of the strip-like annular body. It generally suffices to have 12 protrusions with corresponding abutments on undercuts in order to provide for reliable and constantly reproducible, identical orientation.
In order for it to be possible, on account of production tolerances, to compensate for concentricity errors, preferably adjustable wedges are used as centering elements, which are known, in principle, from the prior art, and are described, for example, in DE 34 39 978 C1 mentioned above.
Further variants and advantages will be described hereinbelow with reference to the drawings, in which:
figure 1 shows a plan view of a tool holder with a tool support mounted therein, figure 2 shows a sectional view taken along line A-A in figure 1, figure 3 shows a sectional view taken along line B-B in figure 1, and figure 4 shows a partially sectional view with a wedge as a centering element.
As far as the machine tool is concerned figure 1 shows a machine holder 10, which is fastened in a conventional manner on the machine tool. This machine holder 10 is fastened to an annular tool support 11 via a bayonet connection, which can be released by movement of the internal milling cutter in the direction of the arrow 12.
The tool support, on its inner lateral surface and on its side surfaces, is fitted with indexable cutter inserts, which are selected and arranged in accordance with the use purpose, for example roughing or smoothing work on a crankshaft. As can be seen from figure 3, there is an additional part used for creating a bayonet connection in the form of a strip-like annular body 13 which, on its outer lateral surface, has noses 14, which bear in corresponding groove guides of the machine holder 10.
Furthermore, the annular body 13, on its inner lateral surface, has protrusions 15, which are interrupted, in part, at equidistant intervals by openings 16 (see figure 1).
These openings 16 have a width and height which allow through-passage of the radially projecting protrusions 17 of the tool support. By virtue of the tool support 11 being rotated (counter to the direction of the arrow 12), these protrusions are guided into undercut regions of the strip-like annular body 13. In the case illustrated in figure 3, the protrusions 17 are guided in a groove-like recess which is formed, on the one hand, by a recess in the annular strip body 13 and, on the other hand, by a recess located opposite in the body of the machine holder 10. Figures 2 and 4, in addition, show a centering element 18 as an adjustable wedge, in the case of which radial adjustability is made possible by means of an eccentric 19 or else similarly acting displacement elements. This centering element, which is known, in principle, according to the prior art, serves to compensate for any concentricity errors.
It is, of course, possible, within the context of the present invention, to use rotation-prevention means or clamping wedges as aids to secure the bayonet connection in the closed state. Also possible are stops to limit the relative rotation of the tool supports used in each case. If necessary, it is also possible to select bayonet-connection configurations which are not rotationally symmetrical, or are rotationally symmetrical only at certain angles of rotation, these ensuring certain preliminary positioning of the tool supports upon introduction into the machine holder.
List of designations Machine holder 11 Tool support 12 Arrow 13 Strip-like annular body 14 Nose Protrusion 16 Openings 17 Protrusion 18 Centering element 19 Eccentric
figure 1 shows a plan view of a tool holder with a tool support mounted therein, figure 2 shows a sectional view taken along line A-A in figure 1, figure 3 shows a sectional view taken along line B-B in figure 1, and figure 4 shows a partially sectional view with a wedge as a centering element.
As far as the machine tool is concerned figure 1 shows a machine holder 10, which is fastened in a conventional manner on the machine tool. This machine holder 10 is fastened to an annular tool support 11 via a bayonet connection, which can be released by movement of the internal milling cutter in the direction of the arrow 12.
The tool support, on its inner lateral surface and on its side surfaces, is fitted with indexable cutter inserts, which are selected and arranged in accordance with the use purpose, for example roughing or smoothing work on a crankshaft. As can be seen from figure 3, there is an additional part used for creating a bayonet connection in the form of a strip-like annular body 13 which, on its outer lateral surface, has noses 14, which bear in corresponding groove guides of the machine holder 10.
Furthermore, the annular body 13, on its inner lateral surface, has protrusions 15, which are interrupted, in part, at equidistant intervals by openings 16 (see figure 1).
These openings 16 have a width and height which allow through-passage of the radially projecting protrusions 17 of the tool support. By virtue of the tool support 11 being rotated (counter to the direction of the arrow 12), these protrusions are guided into undercut regions of the strip-like annular body 13. In the case illustrated in figure 3, the protrusions 17 are guided in a groove-like recess which is formed, on the one hand, by a recess in the annular strip body 13 and, on the other hand, by a recess located opposite in the body of the machine holder 10. Figures 2 and 4, in addition, show a centering element 18 as an adjustable wedge, in the case of which radial adjustability is made possible by means of an eccentric 19 or else similarly acting displacement elements. This centering element, which is known, in principle, according to the prior art, serves to compensate for any concentricity errors.
It is, of course, possible, within the context of the present invention, to use rotation-prevention means or clamping wedges as aids to secure the bayonet connection in the closed state. Also possible are stops to limit the relative rotation of the tool supports used in each case. If necessary, it is also possible to select bayonet-connection configurations which are not rotationally symmetrical, or are rotationally symmetrical only at certain angles of rotation, these ensuring certain preliminary positioning of the tool supports upon introduction into the machine holder.
List of designations Machine holder 11 Tool support 12 Arrow 13 Strip-like annular body 14 Nose Protrusion 16 Openings 17 Protrusion 18 Centering element 19 Eccentric
Claims (4)
1. An internal milling cutter with an annular tool support (11) which, on its inner lateral surface, is fitted with cutting inserts and is fastened in a machine holder (10), characterized by a bayonet connection between the tool support and the machine holder.
2. The internal milling cutter as claimed in claim 1, characterized in that part of the bayonet connection comprises a strip-like annular body (13) which has equidistant protrusions (15) and is screwed in a releasable manner to the tool support (11) or the machine holder (10) and, together therewith, forms a groove-like partially interrupted bayonet guide.
3. The internal milling cutter as claimed in claim 1 or 2, characterized in that the tool support (11), on its outer lateral surface, has 2 to 20, preferably 12, radially projecting noses (14), which are retained on undercuts.
4. The internal milling cutter as claimed in one of claims 1 to 3, characterized by adjustable wedges (18) as centering elements for compensating for any concentricity errors.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE202009011949.1 | 2009-09-03 | ||
| DE202009011949 | 2009-09-03 | ||
| DE202010001331.3 | 2010-01-26 | ||
| DE201020001331 DE202010001331U1 (en) | 2009-09-03 | 2010-01-26 | Innenfräser |
| PCT/EP2010/004989 WO2011026557A1 (en) | 2009-09-03 | 2010-08-13 | Internal milling cutter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2772978A1 true CA2772978A1 (en) | 2011-03-10 |
Family
ID=42105746
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2772978 Abandoned CA2772978A1 (en) | 2009-09-03 | 2010-08-13 | Internal milling cutter |
Country Status (9)
| Country | Link |
|---|---|
| US (1) | US9120158B2 (en) |
| EP (1) | EP2473301A1 (en) |
| JP (1) | JP5638076B2 (en) |
| KR (1) | KR20120058533A (en) |
| CN (1) | CN102548691B (en) |
| BR (1) | BR112012004813A2 (en) |
| CA (1) | CA2772978A1 (en) |
| DE (1) | DE202010001331U1 (en) |
| WO (1) | WO2011026557A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102007013153B4 (en) * | 2007-03-20 | 2019-01-24 | Kennametal Inc. | Tool |
| DE202010001331U1 (en) * | 2009-09-03 | 2010-04-15 | Kennametal Inc. | Innenfräser |
| DE102016114252B4 (en) * | 2016-08-02 | 2018-05-24 | Mag Ias Gmbh | Innenfräs machine |
| EP3335821B1 (en) * | 2016-12-14 | 2020-10-07 | Sandvik Intellectual Property AB | Internal milling cutter |
Family Cites Families (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3848489A (en) * | 1973-03-09 | 1974-11-19 | A Santana | Rotary machine tool |
| JPS5754978Y2 (en) * | 1977-03-31 | 1982-11-27 | ||
| US4204787A (en) | 1978-08-21 | 1980-05-27 | Kennametal Inc. | Milling cutter |
| JPS5920901Y2 (en) | 1979-06-30 | 1984-06-18 | 住友電気工業株式会社 | Cutting tools |
| US4325644A (en) * | 1980-07-30 | 1982-04-20 | International Business Machines Corporation | Work equalizer and loading for a single element printer selection system |
| JPS5871040A (en) | 1981-10-20 | 1983-04-27 | Sandobitsuku Kk | Fitting structure of cutting tool |
| DE3438978C1 (en) | 1984-10-24 | 1985-12-12 | Gebr. Heller Maschinenfabrik GmbH, 7440 Nürtingen | Fastening device for interior-milling-cutter holders |
| JP2513239Y2 (en) | 1990-11-16 | 1996-10-02 | 三菱マテリアル株式会社 | Rolling tool fastening device |
| JP2603600Y2 (en) | 1993-07-26 | 2000-03-15 | 東芝タンガロイ株式会社 | Split-type pin mirror cutter |
| US5433562A (en) * | 1993-12-03 | 1995-07-18 | J. D. Phillips Corporation | Cutter quick change system |
| SE509296C2 (en) * | 1994-11-29 | 1999-01-11 | Mircona Ab | Slot milling device |
| CN1154671A (en) * | 1995-03-24 | 1997-07-16 | 伊斯卡有限公司 | Cutting insert for milling cutter |
| CN1205661A (en) * | 1995-12-22 | 1999-01-20 | 钴碳化钨硬质合金公司 | High speed rotating tool |
| IL127827A (en) * | 1998-12-29 | 2001-08-08 | Iscar Ltd | Slotting cutter |
| US6095021A (en) * | 1999-04-26 | 2000-08-01 | Epperson; Kenneth | Electrically powered hand held pipe cutter |
| JP2000343315A (en) * | 1999-06-03 | 2000-12-12 | Komatsu Koki Kk | Internal cutter for crankshaft mirror |
| ITPD20020193A1 (en) * | 2002-07-12 | 2004-01-12 | Mei Srl | BORING UNIT FOR COMPLEX PIECES, PARTICULARLY FOR DOOR HANDLES, WITH DIFFERENTIAL SYSTEM |
| JP4704202B2 (en) * | 2005-12-08 | 2011-06-15 | 住友電工ハードメタル株式会社 | Mounting structure of pin mirror cutter to adapter |
| DE102007013153B4 (en) * | 2007-03-20 | 2019-01-24 | Kennametal Inc. | Tool |
| DE102009006010A1 (en) | 2009-01-23 | 2010-07-29 | Kennametal Inc. | Device for attaching an annular Fräswerkzeugträgers |
| DE202010001331U1 (en) * | 2009-09-03 | 2010-04-15 | Kennametal Inc. | Innenfräser |
-
2010
- 2010-01-26 DE DE201020001331 patent/DE202010001331U1/en not_active Expired - Lifetime
- 2010-08-13 WO PCT/EP2010/004989 patent/WO2011026557A1/en active Application Filing
- 2010-08-13 US US13/391,874 patent/US9120158B2/en not_active Expired - Fee Related
- 2010-08-13 CA CA 2772978 patent/CA2772978A1/en not_active Abandoned
- 2010-08-13 JP JP2012527214A patent/JP5638076B2/en not_active Expired - Fee Related
- 2010-08-13 CN CN201080039026.7A patent/CN102548691B/en not_active Expired - Fee Related
- 2010-08-13 EP EP10745545A patent/EP2473301A1/en not_active Withdrawn
- 2010-08-13 KR KR1020127005502A patent/KR20120058533A/en not_active Application Discontinuation
- 2010-08-13 BR BR112012004813A patent/BR112012004813A2/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| JP2013503753A (en) | 2013-02-04 |
| JP5638076B2 (en) | 2014-12-10 |
| US20120148351A1 (en) | 2012-06-14 |
| EP2473301A1 (en) | 2012-07-11 |
| CN102548691B (en) | 2015-08-19 |
| BR112012004813A2 (en) | 2019-09-24 |
| WO2011026557A1 (en) | 2011-03-10 |
| US9120158B2 (en) | 2015-09-01 |
| KR20120058533A (en) | 2012-06-07 |
| CN102548691A (en) | 2012-07-04 |
| DE202010001331U1 (en) | 2010-04-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued |
Effective date: 20140813 |